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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "crypto/signature_creator.h"
#include <cryptohi.h>
#include <keyhi.h>
#include <stdlib.h>
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "crypto/nss_util.h"
#include "crypto/rsa_private_key.h"
namespace crypto {
SignatureCreator::~SignatureCreator() {
if (sign_context_) {
SGN_DestroyContext(sign_context_, PR_TRUE);
sign_context_ = NULL;
}
}
// static
SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) {
scoped_ptr<SignatureCreator> result(new SignatureCreator);
result->key_ = key;
result->sign_context_ = SGN_NewContext(SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION,
key->key());
if (!result->sign_context_) {
NOTREACHED();
return NULL;
}
SECStatus rv = SGN_Begin(result->sign_context_);
if (rv != SECSuccess) {
NOTREACHED();
return NULL;
}
return result.release();
}
bool SignatureCreator::Update(const uint8* data_part, int data_part_len) {
// TODO(wtc): Remove this const_cast when we require NSS 3.12.5.
// See NSS bug https://bugzilla.mozilla.org/show_bug.cgi?id=518255
SECStatus rv = SGN_Update(sign_context_,
const_cast<unsigned char*>(data_part),
data_part_len);
if (rv != SECSuccess) {
NOTREACHED();
return false;
}
return true;
}
bool SignatureCreator::Final(std::vector<uint8>* signature) {
SECItem signature_item;
SECStatus rv = SGN_End(sign_context_, &signature_item);
if (rv != SECSuccess) {
NOTREACHED();
return false;
}
signature->assign(signature_item.data,
signature_item.data + signature_item.len);
SECITEM_FreeItem(&signature_item, PR_FALSE);
return true;
}
SignatureCreator::SignatureCreator()
: key_(NULL),
sign_context_(NULL) {
EnsureNSSInit();
}
} // namespace crypto
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